0b8698ab58
The swiotlb_arch_range_needs_mapping() hook should take a physical address rather than a virtual address in order to support highmem pages. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
101 lines
3 KiB
C
101 lines
3 KiB
C
#ifndef __LINUX_SWIOTLB_H
|
|
#define __LINUX_SWIOTLB_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct device;
|
|
struct dma_attrs;
|
|
struct scatterlist;
|
|
|
|
/*
|
|
* Maximum allowable number of contiguous slabs to map,
|
|
* must be a power of 2. What is the appropriate value ?
|
|
* The complexity of {map,unmap}_single is linearly dependent on this value.
|
|
*/
|
|
#define IO_TLB_SEGSIZE 128
|
|
|
|
|
|
/*
|
|
* log of the size of each IO TLB slab. The number of slabs is command line
|
|
* controllable.
|
|
*/
|
|
#define IO_TLB_SHIFT 11
|
|
|
|
extern void
|
|
swiotlb_init(void);
|
|
|
|
extern void *swiotlb_alloc_boot(size_t bytes, unsigned long nslabs);
|
|
extern void *swiotlb_alloc(unsigned order, unsigned long nslabs);
|
|
|
|
extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
|
|
phys_addr_t address);
|
|
extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address);
|
|
|
|
extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);
|
|
|
|
extern void
|
|
*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t flags);
|
|
|
|
extern void
|
|
swiotlb_free_coherent(struct device *hwdev, size_t size,
|
|
void *vaddr, dma_addr_t dma_handle);
|
|
|
|
extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
|
|
unsigned long offset, size_t size,
|
|
enum dma_data_direction dir,
|
|
struct dma_attrs *attrs);
|
|
extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
|
|
size_t size, enum dma_data_direction dir,
|
|
struct dma_attrs *attrs);
|
|
|
|
extern int
|
|
swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
|
|
int direction);
|
|
|
|
extern void
|
|
swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
|
|
int direction);
|
|
|
|
extern int
|
|
swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
|
|
enum dma_data_direction dir, struct dma_attrs *attrs);
|
|
|
|
extern void
|
|
swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
|
|
int nelems, enum dma_data_direction dir,
|
|
struct dma_attrs *attrs);
|
|
|
|
extern void
|
|
swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
|
|
size_t size, enum dma_data_direction dir);
|
|
|
|
extern void
|
|
swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
|
|
int nelems, enum dma_data_direction dir);
|
|
|
|
extern void
|
|
swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
|
|
size_t size, enum dma_data_direction dir);
|
|
|
|
extern void
|
|
swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
|
|
int nelems, enum dma_data_direction dir);
|
|
|
|
extern void
|
|
swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
|
|
unsigned long offset, size_t size,
|
|
enum dma_data_direction dir);
|
|
|
|
extern void
|
|
swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
|
|
unsigned long offset, size_t size,
|
|
enum dma_data_direction dir);
|
|
|
|
extern int
|
|
swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
|
|
|
|
extern int
|
|
swiotlb_dma_supported(struct device *hwdev, u64 mask);
|
|
|
|
#endif /* __LINUX_SWIOTLB_H */
|